Is Metal Detecting allowed: NO, prohibited unless permission from superintendent for scientific activities.
Below is an excerpt from the State Park regulations found HERE.
184.108.40.206 METAL DETECTING: Metal detecting within a state park is prohibited unless a visitor obtains the superintendent’s permission to use metal detectors for scientific activities such as projects permitted through the New Mexico cultural properties review committee or to retrieve lost items.
FMDAC Disclaimer: FMDAC assumes no responsibility for any person who knowingly or accidentally violates any state park regulation. Although FMDAC will try to keep this information current we cannot anticipate how each regulation will be interpreted by a specific park department, park employee or other government employee. It is the sole responsibility of each individual to know and obey the regulations of the park or area they are visiting and or metal detecting.